Mamie Gummer is one of “25? 25-year-old cover stars celebrating Paper Magazine’s 25th Anniversary. The 24 other cover stars are Wale, Kelly Osbourne, Jessica White, Paul Dano, Alexa Chung, Simon O’Connor, Melanie Diaz, Kid Cudi, Avril Lavigne, Mika, Greta Gerwig, Natura Naughton, Max Snow, Aubrey O’Day, Tyson Ritter, Lydia Hearst, Zoe Kazan, Taylor Hanson, Melanie Fiona, Patrick Wolf, Aska Matsumiya, Avril Lavigne, Paul Rodriguez Jr., Josephine de la Baume, and Rob Brown. Paper Magazine and HP will be celebrating 25 years of paper and ink on September 8th at the New York Public Library. Information with much thanks to Just Jared.